//---------------------------------------------------------------------------------
// Copyright (c) 2011, Microsoft Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//---------------------------------------------------------------------------------

namespace Microsoft.Samples.ServiceBus.WindowsPhoneChat.Commands
{
    public abstract class AsyncCommand<TParameter> : Command<TParameter>
    {
        public event AsyncCommandEventHandler<TParameter> ExecuteCompleted;

        protected void OnExecuteCompleted(TParameter parameter)
        {
            this.OnExecuteCompleted(parameter, false);
        }

        protected virtual void OnExecuteCompleted(TParameter parameter, bool cancelled)
        {
            if (this.ExecuteCompleted != null)
            {
                var eventArgs = new AsyncCommandEventArgs<TParameter>(this, parameter, cancelled);
                this.ExecuteCompleted(this, eventArgs);
            }
        }
    }
}
